A new radio double lens from CLASS: B1127+385

We present the discovery of a new gravitational lens system with two compact radio images separated by 0.701 6 0.001 arcsec. The lens system was discovered in the Cosmic Lens All Sky Survey (CLASS) as a at-spectrum radio source. Both radio components show structure in a Very Long Baseline Array (VLBA) 8.4-GHz radio image. No further extended structure is seen in Very Large Array (VLA), Multi-Element Radio Linked Interferometer Network (MERLIN) or VLBA images. Hubble Space Telescope (HST ) WFPC2 images in F555W and F814W show two extended objects close to the radio components, which we identify as two lens galaxies. Their colours and mass-to-light ratios seem to favour two late-type spiral galaxies at relatively high redshifts (z d * 0:5). Faint emission is also detected at positions corresponding to the radio images.